A universe co-existing alongside out own in another dimension. In theory there are an almost infinite number of parallel universes in which every possible consequence of every possible action is played out.2

An element of the transporter which stores the matter stream whilst the other systems function. The stream will normally start to degrade in under a minute, but can be jury rigged to last for decades if need be.6

An element of Cardassian food replicators. In 2369 Chief O'Brien accidentally activated a sabotage device within the pattern generator of a replicator; the device introduced a virus into all the food and drink it created.8

The power a vessel must produce in order to achieve an integer warp factor. Once the peak transitional threshold has been crossed, the power required to maintain the same velocity falls significantly.9

Type of particle weapon used by the Federation. Phasers are capable of knocking a person unconscious, heating objects to very high temperatures, vaporizing them, and possibly even of moving objects into a different continuum.16

A gas comprised of charged particles, often at a high temperature. Plasma is used by Federation Starships to transfer energy around the ships via the plasma transfer conduits, and is fired as a weapon by Romulan ships.18

Element of Deep Space Nine's systems. Plasma manifolds could not be replicated since they contained a Beta matrix compositor, and the failure of one in 2373 prompted a mission to Empok Nor to slavage a replacement.12

Element of the phase cannon of an NX class starship. Under certain conditions the plasma modulators could overload, producing a beam ten times more powerful than normal. When this happened plasma recoil would cause significant damage to the ship unless it could be directed into the hull plating.28

A highly unstable form of matter, the use of protomatter had been declared unethical by the scientific community as of 2285. Despite this, David Marcus included protomatter in the matrix of the Genesis Device as it was the only way to solve certain problems. It was this which made the Genesis Planet unstable and led to it's destruction.36 By the 24th century the use of protomatter was somewhat more accepted - Professor Gideon Seyetik used some in his successful attempt to re-ignite the dead star Epsilon 119 in 2370.37 In the same year the Maquis used a protomatter implosion device to overload the fusion drive of the Cardassian warship Bok'Nor, destroying the ship.38 In 2373, a Founder infiltrator used a device composed of protomatter, trilithium and tekasite in an effort to destroy the Bajoran sun, intending the shockwave to destroy a large fleet of Federation, Klingon and Romulan ships at Deep Space Nine.39 In 2374 the Starship Voyager encountered a nebula that contained high concentrations of protomatter. Neelix was killed during an attempt to beam a quantity of the material into a container which he was holding. Fortunately Borg technology was able to revive him.40